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Communication Dans Un Congrès Année : 2022

Absorption bound of a locally resonant element in a unidimensional scattering problem

Charlie Bricault
  • Fonction : Auteur
  • PersonId : 1185147
Sébastien Goudé
  • Fonction : Auteur
  • PersonId : 1185149

Résumé

We consider the scattering properties of a locally resonant element either in series or in parallel of a waveguide resulting in a unidimensional problem. At the downstream side of the waveguide, an arbitrary passive outlet boundary is accounted for by introducing an impedance boundary condition. The goal is to suppress both the reflected and the transmitted waves by the locally resonant element. It is shown that the absorption coefficient of the system has a frequency-dependent upper bound, which is in general less than one and depends on the impedance of the outlet. The analytical prediction of the maximum absorption is validated against experiment results obtained with specifically designed samples, which work for either a single frequency or a broadband frequency range.
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Dates et versions

hal-03847960 , version 1 (10-11-2022)

Identifiants

  • HAL Id : hal-03847960 , version 1

Citer

Yang Meng, Vicent Romero-García, Gwénaël Gabard, Jean-Philippe Groby, Charlie Bricault, et al.. Absorption bound of a locally resonant element in a unidimensional scattering problem. 16ème Congrès Français d'Acoustique, CFA2022, Société Française d'Acoustique; Laboratoire de Mécanique et d'Acoustique, Apr 2022, Marseille, France. ⟨hal-03847960⟩
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